William ghappell



W. CHAPPELL.

Chimney 'Cap. No. 82,693. Patented Oct. 6, 1868.

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WILLIAM GHAPPELL, OF BUFFALO, NEW YORK.

Letters Patent No. 82,693, dated October 6, 1868.

IMPROVEMENT IN CHIMNEY-GAPS.

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TO ALL WHOM IT MAY CONCERN: I

Be it known that I, WILLIAM CHAPPELL, of the city of Bufi'alo, in the county of Erie, and State of New York, have invented an Improved Ventilator for Chimney-Tops; and I do hereby declare that the following is a full and exact descriptiongthereof, reference being had to the accompanying drawings, in which- Figure I is an elevation of my improvement, represented attached to the top of chimney.

Figure II is aplan of the same. I

Like letters of reference designate like parts in both figures.

Myinvention consists in arranging over the flue or chimneya wheel, provided with spiral or'screw-vanes, of a diameter greater than that of the flue which it surmounts, and so constructed that water falling on the wheel will be conducted by the inclined surfaces of the vanes outside of the mouth of the flue, the wheel performing the double function of increasing thedraught and protecting the mouth of the flue, whereby the expense of an extra cap is dispensed with.

In the drawings 7 A is the top of an ordinary stove-pipe; B, an oval frame secured thereto, which forms the bearings for the vertical shaft, 0, of the wheel D. This wheel is constructed with spiral wings or vanes, E E, of such size as to extend beyond the periphery or mouth of the flue. These-vanes overlap each other, as shown in Fig. II, and are so formed as to conduct water falling upon them outside of the'mouth of the flue.

The wheel, constructed as shown, will always rotate in the direction indicated by the arrow, for the reason that the wind impinges on a greater surface'on that side of the wheel which receives it on the under side of the vanes, than that which receives it on the upper side.

Reversing the inclination of the vanes, will obviously cause the wheel to rotatein the opposite direction. In either case, the operation of the wheel will produce a suction or upward draught through the fine. The action of an ascending current in the flue, such as is produced by combustion, will combine with that of the wind, and, for the reason as above stated, cause a rotation of the wheel in the same direction, and thereby add to its efficiency as a ventilator. Y I

The chief advantage of my improvement is its simplicity, when considered with reference to the double function which it performs, viz, that of a ventilator, and also thatof a cap for protecting the mouth of the flue from rain and snow. y

I am aware that wheels with spiral vanes have heretofore been employed in chimney-tops, but in such cases the mouth of the flue is either left exposed to rain, or else is protected by a separate covering, the wheel, as constructed in those devices, being inadequate to afford the necessary protection thereof.

What I claim asmy invention, and desire to secure by Letters Patent, is

The arrangement of the wheel D, over the mouth of a flue or chimney, when made in diameter larger than the outlet, and provided with overlapping spiral vanes, E E, so as to protect the mouth of the flue, as herein set forth.

WILLIAM OHAPPELL.

Witnesses:

W; H. Fonnusn, V. H. BECKER. 

